Apparatus for cooling lard, etc.



C. S. HARDY.

APPARATUS FOR COOLING LARD, ETC.

APPLICATION FILED OCT. 22,1919.

1,405,5 Patented Feb. 7, 1922.

4 SHEETS-SHEET 1- wmvtssss d lwmron Z0 of n'daw/ 47mm 9, a)

A By I ATTORNEYS C. S. HARDY APPARATUS FOR COOLING LARD, ETC.

APPLICATION FILED on. 22. 1919.

1 ,405,584, Patented Feb. 7, 1922.,

a 4 SHEETS-SHEET 2.

I ha ha S l \N g 1 f I I g 4. A K

V n N N uwmron WITNESSES ,1 N l 5; g

% I V I mom/us C. S. HARDY.

APPARATUS FOR COOLING LARD, ETC.

' 7 APPLICATION FILED OCT. 22, I9I9- 1,405,584.

Patented Feb. 7, 1922.

4 SH EETS-SHEET 3.

- INVENTOR WITNESSES (Zarlea ,6 Hardy BY ATTORNEYS C. S. HARDY.

APPARATUS FOR COOLING LARD, ETC.

APPLICATION FILED OCT. 22, 1919.

1,405,584; Patented Feb. 7, 1922.

Q SHEE,TSSHEET 4- INVENTOR WITNESSES ATTORNEYS un-ras stares rarest, s ore-res.

oneanns s. HARDY, or seivinrneo, CALIFORNIA.

emanates non COOLING Lean, ETC.

License.

Specification of Letters Patent.

Patented Feb. '7, 1922.

Application filetlfflctobcr 22, 1919. Serial No. 332,539.

To all whom it may concern-4" Be it known that I, (Jr-Linens citizen of the United States, and a resident of San Diego, in the county of San Diego and State of California, have invented'ceri tain new and useful Improvements in .ikpparatus for Cooling Lard, Etc, of which the following is a specification.

My il'lVBIltlOIl. relates to methods and apparatus designed for cooling melted lard in lard factories and more particularly toan apparatus for cooling and mixing of fats in a uniformly homogeneous product.

The lard as it comes from'the tanks or kettles in such factories must be cooled be fore it is put into the shipping packages,

and especially in the -case of compound lards, as they areternied, composed of animal. and vegetable fats or oils, it is much better that the cooling be done in such a manner as to avoid crystallization as much as possible, and also in preventing the admission of air to the product while being cooled. thus avoiding the mixing of air with the product itself; for warm air coming in contact with cooled lard causes con densatiom-and insuch condensation there impurities and moisture; all of which tend to deteriorate the lard and cause it to spoil in a that time.

The lnventlon consists 1n the mproved means for cooling and blending the lard or lardmaterial and the various devices and combinations of devices set forth in the specification and shown in the drawings forming a part hereof and more definitely pointed out in'theclaims. i

In the accom janying" lrawings: Figure .1 isianend elevationof the'device;

Figurefl is a longitudinal section taken section of one of S. Hennr, a

lected a practical embodiment as shown in the drawings by referring to which it will be seen that Iemploy three cooling and blending cylinders which I shall designate as A; B, and C, arranged around a common drive shaft F at angles of 120 to each other, the

cylinders being set at a slight inclination to the horizontal with their front ends lower than their rear ends, and the shaft F, is mounted on standards G and G Referring to Figure 2, which shows alongitudinal section through one of the cylinders, it will be seen that they (the cylinders being. alike), are composed of concentric walls 0 and O forming an annular brine chamberO, the outer cylinder having heads 18. Y'Vitliin the cylinder O are cages with shaftends, composed of shafts F cross arms.

F connected together 'by longitudinal bars S; rigidly held within the cage and by the bars to which they are riveted or otherwise SGCLHGClttl'G three housing rings .Kspaced apart, two .of-which have their discharge ends contracted or chockedat K,the.purpose of which will later appear.

Attached to bars S are knife-scrapers P, made" in sections and held in positionby bars Q hingedly connected to female hinge joints R riveted tic-bars S. a It should be noted (see Figure 4), thatthe blades P are not hung to the free edges of-bar S but rather back therefrom which prevents blade rP'from fallv ing out of position, the current caused by the rotary movement of the propellers L, forcing saidjscraper knives solidly against the wall Oywhere tliey are held by centrifugal action while theapparatus is in operation. The structure just described forms the inside cage, the'shaft F 4 extending through heads 13 and stuffing box 10.. p

Attached to this shaft F iare cog wheels D. Shaft F being hollow admitting shaft and upon. this shaft F are mountedpropellers L, said propellers being positioned to revolve within the housing rings K, F .re-

volvlng 111 one direct on'at a. speed of about.

200 R. P. M., while shaft F revolves in the opposite or reverse directionata speed of about R.- P. M. The motions of both shaftsF and F are derived from main shaft F to which the internal gear E and the on ternal gear E are fixed at opposite ends. This internal gear E drives shaft F while external gear E meshing with gear D drives hollow shaft F all of which are turned by an external worm placed on the periphery of gear E and operated by worm gear F The lubrication of the bearings'of the apparatus is done by the internal pressure of the lard passing out through such bearings in heads 13, and the shaft F is lubricated b lard passing through its bearingin shaft which is kept tight by stuffing box 11, and the shaft F 4 is kept tight by stuffing box 10. It will be readily understood that with the stufling boxes set to take care of 100 pounds of pressure they will also take care of the vacuum produced by the falling of lard owing to its construction, in practically an open chamber, and the continual agitation while cooling which prevents it from congealing while cooling, without entrance of the air.

The hot lard to be cooled is placed in a receiving tank or reservoir J, which will hold,- say, 9000 pounds, standing at a temperature of 120 F. Extending downwardly from this reservoir is a pipe X controlled by a gate valve w; pipeX is connected to a regulating chamber 1 which has in it an air-tight float I having stems at its upper and lower ends, a and i, which pass through the guides I and I"; the upper stein i has a button or stop I on it which limits the upward movement of the float while the lower stem 2" carries a beveled valve P, which may engage the beveled valve seat I placed above the lower stem guide. From the regulating chamber extends downwardly a continuation of pipe X, which is connected with the pump H which has extending upwardly from it the pipe X; another pipe X com-- municates with the opposite end of pump H and within pipe X v is placed an intercepting pressure regulating valve W, this valve being normally held to its'seat by a weight W mounted at the free end of a lever W the opposite end of said lever being pivoted to a standard W projecting from the casing W of the valve W.

The pipe X which extends upwardly from the pump H is connected with by-pass pipe X which has therein a three-way cock T controlling said pipe X and the inlet pipe T to the cylinder A. The by-pass pipe is extended beyond the three-way cockl and connects with the draw off header Y through another three-way cock T; the draw ofi' header is provided with any desired number of draw off spouts Y Y controlled by draw off cocks :1 and 3 by which the cooled lard is run into the receptacles in which the lard is to be packed for shipment.

The pipe X pump H and has the pressure regulatin valve therein 1s connected with pipe Is which also leads to the header Y, and has end of the which connects with the at its junction with said pipe X three-way j cock U which controls pipes X X and the outlet pipe Ufrorn cylinder 0.

The inlet pipes T enter the heads 18 of the cylinders and communicatewith grooves The brine inlets are designated by the character Z, the brine entering at the lower end of the device at Z and passing through branch pipes Z successively into the annular brine chambers O of the several cylinders A, B and G and discharging at the upper and rear part of the device-at Z 7 i The lard to be cooled enters at inlet T in front head 13 thence into groove T in front end of head 13 to approximately the center of the cylinder, the propellers L driving the lard as indicated by arrows towards the back cylinder, the lard striking the back end heads 13 being diverted into space N, such lard returning along inner wall of cylinder 0' which is cooled by cold brine jacketed in chamber 0 the inlet of which is shown under Z being atthe bottom, and the outlet Z being at the top.

The propellers L while driving the lard also causes a rotary motion of the same through a longitudinal zone throughout the cylinder travelling with great velocity caused by choked housing rings K; the cage, however, travelling in the opposite direction to that of the propellers, the knife scrapers attached prevent the lard from congealing on walls, yet do not materially obstruct the rotary motion of the lard, as it is allowed to pass between the parts by bars Q.

. To illustrate the operation of the apparatus we will assume cylinders A, and C to be empty and ready for operation:

Thelard to be processed is in receiving tank J, the gate valve :a being opened, the lard passes down through pipe X into regulator I, thence into pump H, thence by pipe X into cylinder A'by inlet T, thence out of outlet Uthrough into cylinder B at inlet T, thence out of U outletthrough V and into inlet T of cylinder C, thence out of outlet U ofsaid cylinder G into pipe X by way of three-way cock U which has been closed so that lard will not go into pipe X it then returns to pump H through pipe X in which is the intercepted pressure valve WV. For example, when lard is pumped up to a pressure of 100 pounds, regulating valve W opens and allows it to return to the suction end of the pump; lard will then circulate through the cylinders, as the head of the lard in tank J being greater than that in the cylinders, the pump will receive all its suction from cylinders rather than from receiver tank J. The brine in the meantime is turned on and enters at pipe Z into opening branch Z which is at the bottom of cylinder V C and goes out of the .top at the back-endof the cylinder 0 into the. bottom of the back 'end of cylinder B'through'byepass Z then out of the top at the front end of cylinder B into the bottom endat the front of'cylinder A, thence out of'the top of cylinder A at the back end, and at Z Thebrine is kept in constant circulation by a special brine pump (not shown), and the lard is kept in con stant circulation by pump H, and the cage and the impellers inside of the cylinders keeps the lard, both longitudinally and cir- V cumferentially, in constant motion while being cooled. U representes a thermometer which is attached at U of cylinder C and when the desired temperature is reached, three-way cock U is so opened as to allow about one-third ofthe lard stream to pass into pipe X?, and theother two-thirds 3) to pass into pipe X The lard whenit enters regulating chamher I Will fill the same man float I1 will raise to open check-valve 1 as shown in the drawings (Figure 1). Lard will then pass into pump H thence by pipe line X to three-way cock T filling cylinders A, B,

and 0. Pressure valve 'W will then be opened as shown; the incoming lard has forced all the air to all high points ofthe apparatus, which will be found to. be the top 'of cylinders A, B and G at their back ends, and at such ends the cylinders are provided with air petcocks a, b, and-c;

WVith the air thus expelled it will readily be seen that there is no further possibility of air entering during operation, asit is sealed by the body of lard in thereceiving tank J. The ump is now started and pressure valve VE has been released so that it will only be raised by the pressure of lard coming through X 7 -The agitating apparatus is then started by applying power from the motor to gear wheel E which operates main shaft F,the gears E of shaft F drive gears D at both front and back'ends of .the cylinders A,B,

and C, respectively, and gear-wheel E? drives propeller shaft to gear E in an op-. posite direction, all of which gives the lard a to and fro, and also a rotary motion, and the pump maintains a constant circulation from onejcylinder to the other. 7

Pet cocks are also provided forlthe brine at its high points to expel air that may have been previously collectedin the brine chambers. Y

The brine is now in continuous circulation,

" likewise the material being processed, and

when a temperature of 60 .F. is reached, as indicated on thermometer U the lard is then ready to pass to drawoif header Y; this is done by opening threerway cock U the assumed capacity of theapparatus being 9000 pounds, per'hour, lard pumpicapacity 60 gallons per minute, and drawing oil throughheader Y, 20 gallons per minute.

This leaves return through pipeX of i40igal-- minute to enter at zero Falhrenlreit and leave the cylinders at 20 Fahrenheit, there havingbeen absorbed 20 degrees from the brine.

. From the above it will be readily seen that air can not enter the apparatus and that lard .is being cooled .by steps and that thecoldest brine is striking the coldest lard and that the cooled lard itself is performing apart of the cooling; it will also be seen that the hottest lard enters the top cylinder and the coldest lard leaves the bottom cylinder, thus avoiding sudden changes, and

causing the mixture to cool step by step,

furthermore, the lard is being constantly agitated while under continual circulaftion and under pressure during all this. I

The result of these above mentioned steps and operations is'to produce ahomogeneousproduct. This is particularly advantageous in making lard substitute, where themelting point of stearine is "120'degrees, while the melting point'of lard is between and 100 degrees.

lVith the process herein described a continual to-and-fro motionis secured in M and I N, and also a rotary motion.

:In addition to these motions aicontinuous circulation passing from one cylinder to an other issecured, and by use of the three-Way cock U a complete regulation without the interruption ofcirculation, allowing to'pass toheader Y,ilard that is sufiiciently cooled,

. 1 When tank J becomes empty it will be as indicated by thermometer U seen that float I will drop seating check valve I on seat I which will prevent-air entering the apparatus from that direction. The three-way cock T connecting pipe and by-pass X with header Y can then be turned. Three-way cock T connecting pipe line X with hy-pass X which then closes passage to cylinder the weight on pres sure regulating valve V is then raised and held by ihook W this causes free passage of lard from cylinders A, B, and Oto the pump it falling by ravity and aid of propellers, notwithstan ing it then being under a vacuum. The valves of the pump Hare so constructed that they will raise by the weight of thematerial.

As the entireapparatus pitches or inclines downwardlv'to the :front, it can be readily seen that all the material will fall out even-- .hinged'bars Q will be tually by gravity and the pump will drive the entire product to header Y.

When the cylinders are. empty, a slight amount of air can be admitted to cylinder A which will allow the pump to pump air and force out the remaining product that It should be noted that the shaft arms F are finished with beveled edges of knife-like form, as plainly shown in Figure l, and from the time the lard. enters a cylinder inletat T it can not gather upon either the heads or walls of the cylinder, for the cross arms F keep the'cylinder heads clean and the sectional scrapers P keep the barrels or cylinders clear. The propellers L working inside the housing rings K keep their drive side clear as well as their inside by their velocity; one side of one propeller is driving against the other'propeller which keeps the back end of the propeller clear by velocity ofthe lard, and the speed that the lard will attain after the section motion through space M striking against the back heads 13' and returning on the outside of rings K in space N will be at sucha speed that no congealing of lard can take'place.

It will also be observed that there are no corners not reached by scrapers. Even kept clean, not only by the rotary motion butby the return motion as well, and all parts of the machine are so beveled as to give the least obstruction to either the to-and-fro motion or the circulating motion.

y arranging the cylinders symmetrically around the common center represented by the main drive shaft F and at 120 degrees apart, perfect drainage and substantial con struction is obtained, and permits the" agitating apparatus of all the cylinders to be directlyconnectedto the gears of the main shaft, which gives a direct connected appa-'v ratus and all parts kept in complete time. 7

While I have shown this device as including three cylinders which I have found is a practical form, it must be understood that the same cooling process can be used witha single cylinder. For example, the by-pass may be disconnected from cylinder A and connection made from cylinder A to threeway cock U direct. The cylinder A will then be operating as a single unit.

Hence it will be understood that the es sence of my invention is in an air-tight cylrfor admitting ho-t lard at one end inder with an agitatingand scraping mechanism within the same, which will cause the mixture to travel to and fro and rotate at the same time and keep in continuous circulation by means of a pump and draw-ofi in quantities, as fast as cooled, by a three way cock U all of which is done'in an airtight receptacle under pressure and which is surrounded by brine which is absorbing the heat from the enclosed mixture and that by steps practically the same as with three cylinders due to the return cooledlard coming in contact with the entering hot lard.

It will further be noted that the cocks of V drawof? header Y can be completely shut off without any stoppage of the apparatus. This will simply allow more to by-pass through pressure valve WV.

Referring to Figure 6, it will be noted that the centre portion of the key of threeway regulating cockU is in circular sector form which allows the throttlingof'either end. of the casing. without obstructing either the center or other end'p'ort of the cock casing; This permits the holding back of the lard from draw-off header until it is sufliciently cooled and letting it through only in such quantities as fast as cooled'without' interfering with the circulation through the cylinders.

I claim:

1; In an apparatus for cooling and homogenizing lard and lard compound, in combination, inner and outer stationary cylinders having stationary heads at each end, means cylinders, means for discharging the cooled product from the same end of the cylinders, means for'agitatinp' and propelling the central portion of the lard mass within the cylinder in one direction, means for agitating and propelling the outer or circumferential portion of said mass in the opposite direc-' tion, and means for maintaining a continuone circulation of-arefrigerating medium within the annular space between the said inner and outer stationary-cylinders.

2. In an apparatus for cooling and homogenizing lard and lard compound, in combination, a supply tank for the hot processed substances, an automatic regulating chamber connected therewith, a conduit leading from said chamber, pumping means connected with said conduit. a discharge pipe of said enizing lard, in combination, a plurality of incense inder outlet pipe to the opposite end of. the pumping means, a'pressu're regulating-valve in said last mentioned pump inlet pipe, a draw off header pipe communicating with the inlet pipe to the cooling cylinder, a discharge pipe leading fromthe, three-way cock of the cylindei outlet, a three-way cock in said header-draw ofil pipe, said last mentioned discharge pipe communicating with said three-way cock of the draw off headerpipe means for' discharging from said draw o header, means for causing a circulation and agitation of the mass to be cooled through the said cylinder, means for operating said pump, and means for causing a continuous circulation of refrigerating fluid around said cylinder.

3. In an apparatus for coolingand ho1nogenizing lard, in combination, a plurality of stationary cooling cylinders symmetrically grouped around a common axis and having front andrear heads, said cylinders inclining downwardly from their rear ends to their front ends. v

4:. In an apparatus for cooling and homogstationary cylinders composed of concentric inner and outer walls providing an annular space between the same, stationary heads at the opposite ends of said cylinders closing the same and the annular space, lard inlets and outlets in the front heads of said cylinders, said cylinders grouped symmetrically around a common axis, and disposed laterally at equal angles from each other,

means for propelling and agitating the lard 'mass within the inner cylinder in central and circumferential streams in opposite directions and at different velocities, means for driving said propelling and agitating means, and means for causing a continuous circulation of refrigerating fluid within the annular space between the concentric cylinders.

5. In an apparatus for cooling lard, in combination, a plurality of double walled cooling cylinders grouped symmetrically around a common axis, heads hermetically closing the front and rear ends of said cylinders, inlets and outlets through the front heads of the cylinders,a cooling medium continuously circulating between the double walls of the cylinders, means for causing a longitudinal and circumferential move ment and agitation of the contents of the inner cylinders, and means for scraping the inner circumference of said inner cylinders and preventing congelation thereon.

6. In an apparatus for cooling and homogenizing lard and the like, in combination, a plurality of double walled stationary cylinders and heads hermetically closing the front and rear ends thereof, means for causing a continuous circulation of refrigerating fluid between said walls of the cylinders, lard in-. lets and outlets in the front heads of said cylinders, means for-agitating and circulating the lardmass. withinthe, inner cylinder, said means including a cage comprising end scraper blades having hollow journals eX- tending through the said cylinder heads, longitudinal bars connecting said. end scrapers. housing rings, secured within, said longitudinal bars, a propeller shaft j'ournaled in said hollow journals and-extend" ingthrough the cylinder heads, propellers rigidly mounted on said propeller shaft with in the housing rings, scraping blades pivotally mounted on said longitudinal connecting bars of the cage and adapted to be thrown and held against the inner sur-' heads of the cylinder, propeller shafts journaled in said hollow shafts, and stufling boxes at the outer ends of said propeller shafts.

8. In an apparatus for cooling lard, in combination, acooling receptacle consisting of concentric cylinders having an annular space between the same, means for causing a continuous circulation of refrigerating fluid through said annular space, rotary propelling and agitating means with the inner cylinder, said means comprising a cage, spiral propellingblades within the cage, and ccntrifugally actuated scrapers longitudinally dispose-d and hinged to the periphery of said cage and contacting with the inner circumference of said inner cylinder.

9. In an, apparatus for cooling lard, in combination, an exteriorly cooled air-tight cylinder, means for propelling and agitating the lard within the cylinder, and sec tional scrapers carried by the. agitating means and adapted torock on an axis parallel with y the axis of the propelling and agitating means, said axis and the edge of the scrapers travellingin planes concentric with the axis of the propelling and agitating'means and centrifugally contacting with the inner circumference of the cylinder. 10. In an apparatus for cooling and homog enizing lard, in combination, an exteriorly cooled cylinder, means for propelling and agitating the lard in a central longitudinal stream, said means including a cage,rotat ably mounted in the cylinder, choke rings mounted in the cage and spiral blade propellers revolving within said choke rings.

11. In an apparatus for cooling and homogenizing lard, in COI11biIl&tiOl1,. an eXteriox-ly threewvay draw-0E cock provided With a cooled cyhnder, means for propelhng and key the center of whlch is in circular sector agltatlng the lard 1n a central longltudlnal iorm.

stream, said means including a cage, rotat- CHARLES S. HARDY. ably mounted in the cylinder, choke rings Witnesses mounted in the cage and spiral blade pro- BERT M. HARDY,

pell ers revolving within said choke rings, a V IRVING C. VEALL. 

